Home / 136,999.20-189,046.56-76,561.92

Finding the Fourth Proportional to 136,999.20, 189,046.56 and 76,561.92

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Solution

The fourth proportional to 136,999.20, 189,046.56 and 76,561.92 is: 105,648.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,999.20 : 189,046.56 = 76,561.92 : x
  2. Step 2: Convert to fraction form
    136,999.20/189,046.56 = 76,561.92/x
  3. Step 3: Cross multiply
    136,999.20x = 189,046.56 × 76,561.92
  4. Step 4: Simplify right side
    136,999.20x = 14,473,767,603.00
  5. Step 5: Solve for x
    x = 14,473,767,603.00/136,999.20
  6. Step 6: Final answer
    x = 105,648.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.